General Information - Carrier 42N *** S Series Installation And Operation Manual

42N - FAN COIL UNITS
Fig.23-24-25.
5 . Control box panel
6 . Hooks for control fixing
Fig.13. 7 . Temperature sensor
Dimensions (mm) and weight, cabinet unit 8 . No. 2 screws for coil earthing
X . Cabinet version 9 . Front drain pan
10 . Rubber tabs for coil hook
 . Slots for wall vertical fixing
11 . Thermoelectric valve head
 . Condensate discharge Ø 20 mm O.D. drain
12 . Cold water circuit
connection
 . Cover panels (accessories) 13 . Hot water circuit
 . Supporting feet (accessories)
Fig.27.
 . Slots for horizontal ceiling fixing
Control box panel for versions without electric
Dimensions (mm) and weight, concealed unit heater
Y . Concealed version  . Control connection cables
 . Condensate discharge Ø 20 mm O.D. drain  . Motor connection cables
 . Power supply cables (230V ~)
connection
 . Cables
 . Supporting feet (accessories)
 . Fan motor capacitor
 . Cool Ø 3/4" gas female
 . Heat Ø 1/2" gas female  . Cable holder
 . Power supply unit terminal block
* Only for unit E19.
 . Supplementary motor speed wires
Fig.16.  . Utility terminal block
1 . Minimum distance from the wall
Fig.28.
Control box panel for version with Low Power
Fig.17.
electric heater
Supporting feet and cover panels assembly for
h . Electric heater cables
floor-mounted vertical unit
i . Fuse Holder
Fig.18.
 . Control connection cables
Example of installation of unit with cabinet
 . Motor connection cables
2 . Turn by 180°
 . Power supply cables (230V ~)
 . Cables
Fig.18A.
 . Fan motor capacitor
Example of vertical installation of concealed unit
 . Cable holder
Fig.18B.
 . Power supply unit terminal block
Distance between panel – concealed unit  . Supplementary motor speed wires
A . Intake grille size . Utility terminal block
B . Supply grille size
Fig.28b.
C . Panel size
Control box panel for version with High Power
Fig.19. electric heater
h . Electric heater cables
3 . Screw anchor with double screw
 . Control connection cables
4 . Air vent
 . Motor connection cables
Fig.21.
 . Power supply cables (230V ~)
Space for water connections
 . Cables
Front view
 . Fan motor capacitor
 . IN
 . Cable holder
 . OUT
 . Power supply unit terminal block
 . Cool Ø 3/4" gas female
q . Power supply electric heater terminal block
 . Heat Ø 1/2" gas female
 . Supplementary motor speed wires
 . Condensate drain
s . Relay for high power electric heater
 . Floor
. Utility terminal block
Fig.22.
Fig.29.
Space for water connections
Motor fan wire connections
Top view
a blue (motor neutral)
b red (ultra low speed)
c white (medium speed)

General information

Unit installation
read this instruction manual thoroughly before using the unit and
keep it for further consultation even after installation.
• The unit complies with all applicable standards for EC marking
(for further details see Declaration of Conformity).
• The installation must be carried out by a qualified installer.
• For safety reasons, installers are required to read the general
information carefully.
• Follow all the instructions below to ensure safety.
• Inspect the unit for damage due to improper transport. Do not install
or use damaged equipment.
• To prevent fire, explosion or injury, do not operate the unit near
dangerous substances or close to naked light equipment.
16 42N_S 42N_E
d black (super high speed)
e yellow (low speed – not connected)
f orange (high speed – not connected)
Fig.30.
Control type "A"
Fig.31.
Control type "B"
Fig.29-30-31.
14 . ON/OFF/fan speed selector
15 . Blue LED - cooling operation
16 . Seasonal changeover button
17 . Red LED - heating operation
18 . Yellow LED - automatic operation (only for type "B")
19 . Energy saving button
20. Yellow LED - energy saving operation
21 . Temperature knob
Fig.32.
22 . Control
23 . Screw to close the control
24. Control cable
25 . Control box panel
26. Metal plate to fix the control
27 . Screws
Fig.33.
28. Screw
29. Screw anchor
Fig.34.
30. Minimum temperature sensor (optional)
31 . Air sensor
32 . Jumper to select remote temperature sensor or
internal sensor
33 . Internal temperature sensor
34. Dip-switch selectors
Fig.35.
X . Control internal sensor
Y . Unit - mounted sensor
Fig.36.
35 . Protection grille
36. Safety thermostat
Fig.37.
Concealed units size of return/supply duct.
Fig.39-40.
43. Filter tabs
Fig.41.
Tangential unit with "Low Energy Consumption Fan Motor"
Fig.42.
Centrifugal unit single shaft with "Low Energy
Consumption Fan Motor"
Fig.43.
Centrifugal unit dual shaft with "Low Energy
Consumption Fan Motor"
• Ensure that national safety code requirements have been followed
for the main supply circuit. Follow all current national safety code
requirements. Ensure that a properly sized and connected ground
wire is in place.
• Check that voltage and frequency of the mains power supply are
those required for the unit to be installed; the available power must be
adequate to operate any other appliances connected to the same line.
• Make sure that properly sized disconnecting and safety switches are
installed.
• The manufacturer declines any liability fror damage resulting from
modifications or errors in the electrical or hydraulic connections.
Failure to observe the installation instructions, or use of the unit under
conditions other than those indicated in the table "Operating limits" of
the unit installation manual, will immediately invalidate the unit warranty.
General information
• After installation thoroughly test system operation and explain all
system functions to the owner.
• All of the manufacturing and packaging materials used for your
new appliance are compatible with the environment and can be
recycled.
• Dispose of the packaging material in accordance with local
requiremements.
• When installing the electric heater kit and after connecting the
electric cables, cover the connectors using the silicon rubber caps.
Check that the coil is fixed to the structure to ensure its correct
ground connection.
Unit operation
• In order to avoid electric shock, fire or injury, stop the unit and
disconnect the safety switch in case of abnormal events (such as smell
of burning) and call Carrier Service for further instructions.
• Do not place containers filled with liquids or other objects onto the unit.
Maintenance
WArNING: Disconnect the mains power supply prior to any maintenance
operations or prior to handling any internal parts of the unit.
• A routine maintenance should be carried out on the unit to check the
correct operation of the electric connections and protection devices.
• Maintenance operations must be carried out by specially trained
personnel.
• Do not attempt to repair, move, modify or re-install the unit on your
own. To avoid electric shock or fire make sure these operations are
carried out by qualified personnel only.
Warnings: avoid...
... any obstruction of the unit air outlet or return. Leave 1 metre
minimum of free space (See fig. 1)
... exposure to oil vapours (See fig. 2)
... installation in areas with high frequency waves (See fig. 3)
... any rise in the condensate drain piping.
... horizontal condensate drain piping with less than 2% slope
(See fig. 4)
... slack on electrical connections (See fig. 5)
... disconnecting water connections after installation (See fig. 6)
... exposure to direct sunshine, when unit is operating in cooling mode;
Installation
receipt of unit
• Check that packaging is undamaged.
• Unpack unit and check immediately for damage during transportation.
• Packaging contains the base unit and, if supplied, the unit cabinet.
• Verify that all components ordered are supplied.
Unit preparation
• Take out and position template printed on the packaging. It is
advisable to keep cabinet packed until installation is complete.
• To install the cabinet, position it onto the base unit and fix it to the
special tabs on the unit rear side and then secure it with the two
screws supplied (See fig.14-15).
• If the unit is installed at 150 mm from the floor or lower, use the angles
supplied with the base unit to prevent the user from touching the
moving parts (See fig.14-15).
• Contact the qualified service if one of the following events takes place:
- hot or damaged power supply cable;
- unusual noise during operation;
- frequent operation of the protection devices;
- unusual smell (such as smell of burning).
Choosing the installation site
• Choose an area free from obstructions which may cause irregular air
distribution and/or return.
• Check that the wall surface is flat enough to allow easy and safe
installation of the unit. The wall structure should be strong enough
to carry the unit weight and avoid deformation, rupture or vibration
during operation.
• Consider using an area where installation is easy.
• Choose a position that allows for the clearances required (see
drawing).
• Look for a position in the room which assures the best possible air
distribution.
• Install unit in a position where condensate can easily be piped to an
appropriate drain.
Positions to avoid:
• Exposed to direct sun.
• Too close to heat sources.
• On humid walls or positions with water hazard, e.g. laundry premises.
• Exposure to oil vapours (e.g. kitchens, workshops).
• Where curtains or furniture may obstruct free air circulation.
always use shutters or shades (See fig. 7)
... positions too close to heating sources which may damage the unit
(See fig. 8)
... connecting condensate piping to sewage system drain without
appropriate trap (See fig. 9)
... only partial insulation of the piping (See fig. 10)
... installation not correctly levelled which will cause condensate
dripping (See fig. 11)
... flattening or kinking pipes or condensate pipes (See fig. 12)
• If, instead, the unit is installed higher than 150 mm from the floor, use
the rear closing grille kit (code 42N0954-42N0955-42N0956-42N0957)
according to the unit size. For horizontal installation at more than 2.5
meters from the floor, the angles supplied need not be used.
• For horizontal installation at more than 2.5 meters from the floor, the
angles supplied need not be used.
Installation
• Before proceeding to unit installation, it is recommended to assemble
the accessories according to the instructions supplied with the kit.
• It is advisable to lock the cover on the opposite side to the control or
on both sides if the control is not positioned on the unit.
• Knock out the prepunched part of the cover to insert the screw.
• Furthermore it is possible to lock the control cover.
42N_S 42N_E
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